This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
我看了启动过程,请问如何辨别板子是SD mmc nand flash nor flash启动?(如果不看拨码开关的话)
你好,
DM8148有两级uboot,一个uboot-min,一个uboot。RBL(rom bootloader)会其他uboot-min,然后uboot-min再启动uboot。关于硬件是从那种启动模式启动的,RBL在上电复位后会去读取相应boot管脚的电平来获取启动模式。在uboot没有对启动模式有关的操作。芯片启动后,你可以读取CONTROL_STATUS.SYSBOOT的值 (System Boot Type and the default value comes from BOOT[4:0] pins)来了解外界boot引脚的电平值。